<template>
  <div class="login_container">
    <div class="login_box">
		<!-- 头像区域 -->
      <div class="avatar_box">
         <img src="../assets/logo.png" alt="">
      </div>
		<!-- 登录表单区域 -->
		<el-form  ref="loginFormRef" :model="loginForm" :rules="loginFormRules" label-width="0px" class="login_form">
			<!-- 用户名 -->
			<el-form-item prop="username">
				<el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
			</el-form-item>
			<!-- 密码 -->
			<el-form-item prop="password">
				<el-input v-model="loginForm.password" prefix-icon="iconfont icon-3702mima" type="password"></el-input>
			</el-form-item>
			<!-- 按钮区域 -->
			<el-form-item class="btns">
				<el-button type="primary" @click="login">登录</el-button>
				<el-button type="info" @click="resetLoginForm">重置</el-button>
			</el-form-item>
		</el-form>
   </div>
  </div>
</template>

<script>
export default {
	data(){
		return{
			//这是登录表单的数据绑定对象
			loginForm: {
				username: 'admin',
				password: '123456'
			},
			// 这是表单的验证规则对象
			loginFormRules: {
				//验证用户名是否合法
				username:[
					{ required: true, message:'请输入登录名称', trigger:'blur' },
					{ min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
				],
				//验证密码是否合法
				password:[
					{ required: true, message:'请输入登录密码', trigger:'blur' },
					{ min: 3, max: 10, message: '长度在 3 到 10 个字符', trigge: 'blur' }
				]
			}
		}
	},
	methods: {
		//点击重置按钮，重置登录表单
		resetLoginForm() {
			// console.log(this)
			this.$refs.loginFormRef.resetFields();
		},
		login(){
			this.$refs.loginFormRef.validate(async valid=>{
				if(!valid) return;
				const {data: res} = await this.$http.post('login', this.loginForm);
				if(res.meta.status !== 200) return this.$message.error('登录失败');
				this.$message.success('登陆成功');
				//1. 将登陆成功之后的token，保存到客户端的seeionStorage中
				//	1.1 项目中出了登录之外的其他API接口，必须在登录之后才能访问
				//	1.2 token只应在当前网站打开期间生效，所以将token保存在sessionStorage中
				console.log(res);
				window.sessionStorage.setItem('token',res.data.token);
				//2.通过编程式导航跳转到后台主页，路由地址是 /home
				this.$router.push('/home')
			});
		}
	}
}
</script>

<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}

.login_box{
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%,-50%);

.avatar_box{
    height: 130px;
	width: 130px;
	border: 1px solid #eee;
	border-radius: 50%;
	padding: 10px;
	box-shadow: 0 0 10px #ddd;
	position: absolute;
	left: 50%;
	transform: translate(-50%,-50%);
	background-color: #fff;
	img{
		width: 100%;
		height: 100%;
		border-radius: 50%;
		background-color: #eee;
	}
  }
}

.login_form{
	position: absolute;
	bottom: 0;
	width: 100%;
	padding: 0 20px;
	box-sizing: border-box;
}

.btns{
	display: flex;
	justify-content: flex-end;
}
</style>
